Merge pull request #6067 from annando/ap-relocation

[friendica.git] / src / Util / JsonLD.php

diff --git a/src/Util/JsonLD.php b/src/Util/JsonLD.php
index 4917c3c015dfc26bafdc6976ad00ded5753e97db..bed7a67d60a01eeccf58bc6a312f6f363541f4b6 100644 (file)
--- a/src/Util/JsonLD.php
+++ b/src/Util/JsonLD.php
@@ -5,7 +5,8 @@
 namespace Friendica\Util;
 
 use Friendica\Core\Cache;
-use digitalbazaar\jsonld as DBJsonLD;
+use Friendica\Core\Logger;
+use Exception;
 
 /**
  * @brief This class contain methods to work with JsonLD data
@@ -33,7 +34,7 @@ class JsonLD
                }
 
                if ($recursion > 5) {
-                       logger('jsonld bomb detected at: ' . $url);
+                       Logger::log('jsonld bomb detected at: ' . $url);
                        exit();
                }
 
@@ -43,7 +44,7 @@ class JsonLD
                }
 
                $data = jsonld_default_document_loader($url);
-               Cache::set('documentLoader:' . $url, $data, CACHE_DAY);
+               Cache::set('documentLoader:' . $url, $data, Cache::DAY);
                return $data;
        }
 
@@ -60,7 +61,15 @@ class JsonLD
 
                $jsonobj = json_decode(json_encode($json, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
 
-               return jsonld_normalize($jsonobj, array('algorithm' => 'URDNA2015', 'format' => 'application/nquads'));
+               try {
+                       $normalized = jsonld_normalize($jsonobj, array('algorithm' => 'URDNA2015', 'format' => 'application/nquads'));
+               }
+               catch (Exception $e) {
+                       $normalized = false;
+                       Logger::log('normalise error:' . print_r($e, true), Logger::DEBUG);
+               }
+
+               return $normalized;
        }
 
        /**
@@ -74,19 +83,68 @@ class JsonLD
        {
                jsonld_set_document_loader('Friendica\Util\JsonLD::documentLoader');
 
-               $context = (object)['as' => 'https://www.w3.org/ns/activitystreams',
-                       'w3sec' => 'https://w3id.org/security',
-                       'ostatus' => (object)['@id' => 'http://ostatus.org#', '@type' => '@id'],
+               $context = (object)['as' => 'https://www.w3.org/ns/activitystreams#',
+                       'w3id' => 'https://w3id.org/security#',
+                       'ldp' => (object)['@id' => 'http://www.w3.org/ns/ldp#', '@type' => '@id'],
                        'vcard' => (object)['@id' => 'http://www.w3.org/2006/vcard/ns#', '@type' => '@id'],
-                       'uuid' => (object)['@id' => 'http://schema.org/identifier', '@type' => '@id']];
+                       'dfrn' => (object)['@id' => 'http://purl.org/macgirvin/dfrn/1.0/', '@type' => '@id'],
+                       'diaspora' => (object)['@id' => 'https://diasporafoundation.org/ns/', '@type' => '@id'],
+                       'ostatus' => (object)['@id' => 'http://ostatus.org#', '@type' => '@id'],
+                       'dc' => (object)['@id' => 'http://purl.org/dc/terms/', '@type' => '@id']];
 
                $jsonobj = json_decode(json_encode($json, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE));
 
-               $compacted = jsonld_compact($jsonobj, $context);
+
+               try {
+                       $compacted = jsonld_compact($jsonobj, $context);
+               }
+               catch (Exception $e) {
+                       $compacted = false;
+                       Logger::log('compacting error:' . print_r($e, true), Logger::DEBUG);
+               }
 
                return json_decode(json_encode($compacted, JSON_UNESCAPED_SLASHES | JSON_UNESCAPED_UNICODE), true);
        }
 
+       /**
+        * @brief Fetches an element array from a JSON array
+        *
+        * @param $array
+        * @param $element
+        * @param $key
+        *
+        * @return fetched element array
+        */
+       public static function fetchElementArray($array, $element, $key = '@id')
+       {
+               if (empty($array)) {
+                       return null;
+               }
+
+               if (!isset($array[$element])) {
+                       return null;
+               }
+
+               // If it isn't an array yet, make it to one
+               if (!is_int(key($array[$element]))) {
+                       $array[$element] = [$array[$element]];
+               }
+
+               $elements = [];
+
+               foreach ($array[$element] as $entry) {
+                       if (!is_array($entry)) {
+                               $elements[] = $entry;
+                       } elseif (!empty($entry[$key])) {
+                               $elements[] = $entry[$key];
+                       } elseif (!empty($entry) || !is_array($entry)) {
+                               $elements[] = $entry;
+                       }
+               }
+
+               return $elements;
+       }
+
        /**
         * @brief Fetches an element from a JSON array
         *
@@ -98,38 +156,40 @@ class JsonLD
         *
         * @return fetched element
         */
-       public static function fetchElement($array, $element, $key, $type = null, $type_value = null)
+       public static function fetchElement($array, $element, $key = '@id', $type = null, $type_value = null)
        {
                if (empty($array)) {
-                       return false;
+                       return null;
                }
 
-               if (empty($array[$element])) {
-                       return false;
+               if (!isset($array[$element])) {
+                       return null;
                }
 
-               if (is_string($array[$element])) {
+               if (!is_array($array[$element])) {
                        return $array[$element];
                }
 
-               if (is_null($type_value)) {
-                       if (!empty($array[$element][$key])) {
-                               return $array[$element][$key];
+               if (is_null($type) || is_null($type_value)) {
+                       $element_array = self::fetchElementArray($array, $element, $key);
+                       if (is_null($element_array)) {
+                               return null;
                        }
 
-                       if (!empty($array[$element][0][$key])) {
-                               return $array[$element][0][$key];
-                       }
-
-                       return false;
+                       return array_shift($element_array);
                }
 
-               if (!empty($array[$element][$key]) && !empty($array[$element][$type]) && ($array[$element][$type] == $type_value)) {
-                       return $array[$element][$key];
+               $element_array = self::fetchElementArray($array, $element);
+               if (is_null($element_array)) {
+                       return null;
                }
 
-               /// @todo Add array search
+               foreach ($element_array as $entry) {
+                       if (isset($entry[$key]) && isset($entry[$type]) && ($entry[$type] == $type_value)) {
+                               return $entry[$key];
+                       }
+               }
 
-               return false;
+               return null;
        }
 }